@article{MAN_1951__124_160264,
     author = {H. Hornich},
     title = {Zur {Theorie} der partiellen {Differentialgleichungen.}},
     journal = {Mathematische Annalen},
     pages = {148--150},
     publisher = {mathdoc},
     volume = {124},
     year = {1951},
     zbl = {0046.10303},
     url = {http://geodesic.mathdoc.fr/item/MAN_1951__124_160264/}
}